Quiznetik
Electromagnetic Interference | Set 2
1. The adjustment of position of shading bands, in an energy meter is done to provide
A. friction compensation
B. creep compensation
C. braking torque
D. none of the above
Correct : A. friction compensation
2. In an energymeter braking torque is produced to
A. safe guard it against creep
B. brake the instrument
C. bring energy meter to stand still
D. maintain steady speed and equal to driving torque
Correct : D. maintain steady speed and equal to driving torque
3. Various adjustments in an energy meter include
A. light load or friction
B. lag and creep
C. overload and voltage compensation
D. all of the above
Correct : D. all of the above
4. Dipsticks are used for the
A. pressure measurement
B. flow measurement
C. displacement measurement
D. level measurement
Correct : D. level measurement
5. In ultrasonic level gauge, the ultrasonic source is placed at the
A. bottom of the vessel containing the liquid
B. top of the vessel containing the liquid
C. middle of the vessel containing the liquid
D. far from the vessel containing the liquid
Correct : A. bottom of the vessel containing the liquid
6. What is the principle of operation of LVDT?
A. mutual inductance
B. self-inductance
C. permanence
D. reluctance
Correct : A. mutual inductance
7. LVDT used for measurement of
A. temperature
B. displacement measurement
C. resistance
D. voltage
Correct : B. displacement measurement
8. Electrical strain gauge works on the principle of
A. variation of resistance
B. variation of capacitance
C. variation of inductance
D. variation of area
Correct : A. variation of resistance
9. Commonly used elements for wire strain gauges are
A. nickel and copper
B. nickel and gold
C. gold and brass
D. silver and aluminium
Correct : A. nickel and copper
10. C.R.O gives
A. actual representation
B. visual representation
C. approximate representation
D. incorrect representation
Correct : B. visual representation
11. CRO is a
A. fast x-y plotter
B. slow x-y plotter
C. medium x-y plotter
D. not a plotter
Correct : A. fast x-y plotter
12. Gauge factor in a strain gauge must be
A. high
B. low
C. medium
D. small
Correct : A. high
13. Strain gauge measurement involves
A. wheatstone bridge
B. kelvin bridge
C. de sauty’s bridge
D. anderson bridge
Correct : A. wheatstone bridge
14. Strain gauge used for measurement of
A. temperature
B. resistance
C. inductance
D. displacement
Correct : D. displacement
15. Deflection system of a CRT consists of
A. 4 plates
B. 6 plates
C. 2 plates
D. 8 plates
Correct : C. 2 plates
16. Electrical transducers generate
A. biological signals
B. chemical signals
C. physical signals
D. electrical signals
Correct : D. electrical signals
17. How do passive transducers develop electrical signals
A. using a transformer
B. using internal source
C. using external source
D. using a diode
Correct : C. using external source
18. A transducer must be
A. quick in response
B. slow in response
C. medium in response
D. very slow in response
Correct : A. quick in response
19. McLeod gauge used for measurement of
A. high pressure
B. low pressure
C. very high pressure
D. pressure
Correct : B. low pressure
20. Temperature transducers make use of
A. change in resistivity
B. change in length
C. change in area
D. change in capacitance
Correct : A. change in resistivity